<< >> NASA ASRS Report 441343, June 1999

Air carrier crew off phx in climb to 15000 ft encountered traffic at 9000 ft. Flight was 8400 ft when ATC instructed crew to maintain 8000 ft.

Attributes
ACN	441343
Time
Date	199906
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phx.airport
State Reference	AZ
Altitude	msl single value : 8400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : p50.tracon
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : p50.tracon
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : multi engine pilot : atp
ASRS Report	441343
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : published procedure
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance controller : issued advisory
Miss Distance	horizontal : 12000 vertical : 500
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

After takeoff runway 26L phx, tower said 'contact departure.' first officer switched to departure frequency. Before first officer could say anything, departure controller came on and said 'air carrier X abc cleared to 15000 ft.' first officer read back. Then departure controller came on again and asked our altitude. First officer responded 'passing 3500 ft' or thereabouts. Departure then said 'maintain 230 KTS.' first officer responded. Departure called traffic (aircraft Y) at 11-12 O'clock eastbound at 9000 ft. First officer called traffic in sight. We were in a left turn which would take us behind the Y traffic. Passing 8400 ft departure told us to maintain 8000 ft and we immediately went back down to 8000 ft. Aircraft Y traffic passed about 2 mi to our left. Departure then reclred us to 15000 ft. We climbed to 15000 ft, still at 230 KTS. Suspect high workload and confusion at phx departure control. Never felt there was any danger of collision or near miss.

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Original NASA ASRS Text

Title: ACR CREW OFF PHX IN CLB TO 15000 FT ENCOUNTERED TFC AT 9000 FT. FLT WAS 8400 FT WHEN ATC INSTRUCTED CREW TO MAINTAIN 8000 FT.

Narrative: AFTER TKOF RWY 26L PHX, TWR SAID 'CONTACT DEP.' FO SWITCHED TO DEP FREQ. BEFORE FO COULD SAY ANYTHING, DEP CTLR CAME ON AND SAID 'ACR X ABC CLRED TO 15000 FT.' FO READ BACK. THEN DEP CTLR CAME ON AGAIN AND ASKED OUR ALT. FO RESPONDED 'PASSING 3500 FT' OR THEREABOUTS. DEP THEN SAID 'MAINTAIN 230 KTS.' FO RESPONDED. DEP CALLED TFC (ACFT Y) AT 11-12 O'CLOCK EBOUND AT 9000 FT. FO CALLED TFC IN SIGHT. WE WERE IN A L TURN WHICH WOULD TAKE US BEHIND THE Y TFC. PASSING 8400 FT DEP TOLD US TO MAINTAIN 8000 FT AND WE IMMEDIATELY WENT BACK DOWN TO 8000 FT. ACFT Y TFC PASSED ABOUT 2 MI TO OUR L. DEP THEN RECLRED US TO 15000 FT. WE CLBED TO 15000 FT, STILL AT 230 KTS. SUSPECT HIGH WORKLOAD AND CONFUSION AT PHX DEP CTL. NEVER FELT THERE WAS ANY DANGER OF COLLISION OR NEAR MISS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.